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  4. High-order accurate well-balanced energy stable adaptive moving mesh finite difference schemes for the shallow water equations with non-flat bottom topography
 
research article

High-order accurate well-balanced energy stable adaptive moving mesh finite difference schemes for the shallow water equations with non-flat bottom topography

Zhang, Zhihao
•
Duan, Junming  
•
Tang, Huazhong
November 1, 2023
Journal Of Computational Physics

This paper proposes high-order accurate well-balanced (WB) energy stable (ES) adaptive moving mesh finite difference schemes for the shallow water equations (SWEs) with non flat bottom topography. To enable the construction of the ES schemes on moving meshes, a reformulation of the SWEs is introduced, with the bottom topography as an additional conservative variable that evolves in time. The corresponding energy inequality is derived based on a modified energy function, then the reformulated SWEs and energy inequality are transformed into curvilinear coordinates. A two-point energy conservative (EC) flux is constructed, and high-order EC schemes based on such a flux are proved to be WB that they preserve the lake at rest. Then high-order ES schemes are derived by adding suitable dissipation terms to the EC schemes, which are newly designed to maintain the WB and ES properties simultaneously. The adaptive moving mesh strategy is performed by iteratively solving the Euler-Lagrangian equations of a mesh adaptation functional. The fully-discrete schemes are obtained by using the explicit strong-stability preserving third-order RungeKutta method. Several numerical tests are conducted to validate the accuracy, WB and ES properties, shock-capturing ability, and high efficiency of the schemes.& COPY; 2023 Elsevier Inc. All rights reserved.

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Type
research article
DOI
10.1016/j.jcp.2023.112451
Web of Science ID

WOS:001072187300001

Author(s)
Zhang, Zhihao
Duan, Junming  
Tang, Huazhong
Date Issued

2023-11-01

Publisher

ACADEMIC PRESS INC ELSEVIER SCIENCE

Published in
Journal Of Computational Physics
Volume

492

Article Number

112451

Subjects

Computer Science, Interdisciplinary Applications

•

Physics, Mathematical

•

Computer Science

•

Physics

•

shallow water equations

•

energy stability

•

high-order accuracy

•

well-balance

•

adaptive moving mesh

•

high efficiency

•

exact conservation property

•

weno schemes

•

singular problems

•

galerkin methods

•

volume schemes

•

element-method

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
MCSS  
Available on Infoscience
October 9, 2023
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/201466
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